Coming along nicely! 
Thanks. I'm getting there slowly but surely. Here is the latest update on the cab:
A Pac-Man Is Born: Part 20. Big update -
This is a catch up from the end of last year when I was too busy/lazy to post any updates and also recent work carried out on the cab.
Firstly, I add a couple of pieces of wood behind where the Marquee plexi will sit, so that it sits out further from the LEDs.
Then I got some cheap Aluminium L brackets, cut them to size and attached them with some security screws:

Then with some bigger security screws, I drilled two holes in the metal Bezel "retainer" and used the screws to hold it in place:


I wanted to work on the back of the cabinet next, but its such a pain having to drag the cabinet around with the monitor etc in place. So I decided to put some castors on the bottom of the cab. These might not stay on the cab but it makes it much easier to work on:

I then decided to redo the lower back panel with the holes for the vents. Someone kindly on my youtube channel linked me to a diagram that they had created with the correct dimensions. So I went out and bought a flush router bit and after creating a template, I routed out the correct size holes in a new piece of MDF. Before:

After:

Then I added some mesh behind the holes:

I then did a test fit of the back panel and created a whole so that the back of the CRT wouldn't hit it. I am going to try and replicate the "bubble" on the back of the original at some point. The back panel isn't quite perfect yet so will need some additional work:

Also, I took my control panel metal to a metal fabricator who kindly sharpened the fold/bend with a proper metal folder. This looks much, much better now:

Finally, I glued the front panel in place with the help of some wood screws for added strength:
